Post by V.K.Manchanda on Mar 12, 2014 10:34:36 GMT -5
Hi guys, please let me know the following suppose there are two transformers (a). 5 MVA, 33/11 KV PERCENTAGE IMPEDANCE =7.0 PERCENT CURRENT DENSITY =2.5 AMPS / MM AND L.T TURNS=188 and the second transformer (b). 5 MVA 33/11 KV PERCENTAGE IMPEDANCE=7.0 PERCENT CURRENT DENSITY=2.5 AMPS/MM L.T.TURNS=172 THE VECTOR GROUP IS THE SAME IN BOTH CASES AND THE NO LOAD AND LOAD LOSSES ARE ALMOST SAME IN BOTH CASES I WOULD LIKE TO KNOW WHICH ONE OF THESE TRANSFORMERS HAS BETTER CHANCES OF PASSING THE SHORT CIRCUIT TEST(DYNAMIC ABILITY N THERMAL ABILITY) AND WHY? thanks